Indonesian anti-terrorism police have detained three former students in a raid on a university campus in Pekanbaru, on Sumatra island, and seized crude bombs and other explosive material, police said.
The men, who have been named as suspects, are thought to have been planning to attack the local parliament in Pekanbaru, the capital of Riau province, national police spokesman Setyo Wasisto said in a statement.
During Saturday’s raid on a faculty at Riau University, police found a pipe bomb, a homemade grenade, as well as the homemade explosive triacetone triperoxide (TATP), known as the “mother of Satan”, Wasisto said.
They also seized an air rifle and sets of bows and arrows, as well as other material such as fertilizer that could be used to make bombs, he said.
Authorities have highlighted concerns about a rise in radicalism at universities in the world’s biggest Muslim-majority country.
A number of recent surveys of students have pointed to significant support for Islamic State, carrying out jihad and the establishment of a caliphate in Indonesia.
Read more: Reuters